What can you really learn from a biological ageing test?

There's a race going on in Silicon Valley to find ways to slow down ageing and monetise longevity. Some of the tools used to measure this are biological age tests that give various health readings. Can you biohack your way to reverse ageing?  Parents and caregivers of adolescents can worry about the side effects of taking oral medications for acne. A new study into the use of isotretinoin found no association with reduced adult height.  A newly updated human-infective RNA virus dataset may be used to find patterns that help predict what a future virus, or ‘disease x’ might look like.  References Four Corners: The Race to Reverse Aging Isotretinoin Treatment in Adolescence and Adult Height A complete catalogue of human-infective RNA viruses UK begins trials of Ebola vaccine developed in just eight weeks Future pharmacy: A better deal for patients and taxpayers Pete Hegseth announces plan to test US troops for low testosterone